Tool-based language development

This paper shows how to tackle the problem of ever larger languages and the problem of combining multiple languages. The central idea is to build a foundation for language definitions that uses a metamodel-driven approach with support of language engineering tools. Thus development and further evolution of languages will be transformed from the traditional paper- and -pen style into an engineering activity. This allows an early detection of problems within the language definition and increases the reliability of the language and the supporting tools.